Furnace construction



Nov. 25, 1924.

@5er C/C1 Ummm,

Patented Nev. 25, 1924.

UNITED STATES 1,516,969 PATENT OFFICE.

JOHN KER-CI-I, O AKRON, OHIO, .ASSIGNOR TO THE XXTH CENTURY HEATING AND VENTILATING COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

FURNACE CONSTRUCTEON.

Application filed April 9, 1923. Serial Ne. 630,693.

more specifically to that type of furnacewhich is composed or built up of several sections or castings and the object of the invention isto improve upon the `sealing means between the several sections. Y

Heretofore, the furnaces of this type have been provided at the junction between the several parts with sealing means which has not been entirely satisfactory and it isy the object of the invention: to so construct and arrange the furnace sections that improved sealing means may be provided.

In prior constructions of this type a simple ledge has been provided along the upper edge of each section with an outwardly upwardly extending flange and the lower edge of the next section abovel hasvbeenseated therein, the -ledgebeing providedwith a suitable. cement or filler to close the joints about the f-urnace. Irl-'use the sealing means has proven inadequate to prevent gases from oftentimes leaking out through the cracks ofthefurnace and mingling with the heated air. At. times explosions will occur infurnaces and unless the force of the explosion can be expended through the door openings,

they will often blow out through the jointsl in the furnace, the sealing means which has been described offering insufficient` resistance to the force of the explosion. 'i i With the improved construction herein shown, these faults are remedied and while the description and showing is detailed, the

invention is not necessarily limited to these details as will be understood from the scopel of the attached claims, which are intended to cover the invention as broadly as permitted by the prior art.

In the drawings:

Figure 1 is a perspective view of a furnace of the general type described, parts beingbroken away to illustrate the oints; and

*igure 2 is a vertical section through one side of the furnace.

l/Vhile the invention is shown as applied to a certain-type of furnace, it will be understood .that it is not limited to this use alone and while a "type of furnace suitable for soft coal is shown, the invention is applicable to hard coal furnaces as well.

` The furnace comprises the ring support or frame work at the base indicated by the numeral 1, which is adapted to support the furnace and the outer casing enclosing the air space as will be understood. Supported upon the base and in the order named are the ash pit section 2, the fire pot section 3, the feed section 4, and the dome or radiator 5.

The base is` provided with a ledge 6 and with-a surrounding flange 7 and the lower edge of the ash pit seats on the ledge and is formed with a horizontal flange or rib 8 which overlies thc top of the flange. The upper edge of the ash pit is provided with a similar ledge 9 and flange 10 and the lower edge of the re pot rests on the ledge 9 and is provided with a flange or rib 11 which overlies the flange 10.

The upper edge of the fire pot is formed with a circumferential groove 12 on either side of which are continuous vertical flanges 13.- The lower edge of the feed section is provided with a circular rib :14 which seats in the groove and in addition is enlarged at its lower edge to provide fianges or ribs 15 on both lsides thereof which overlie the flanges 13. The groove 12 with its flanges 13 andthe rib 14 with the flanges 15 provide a three-point or three-line contact at the crack between the fire pot and the feed section. As this is the most important joint of the furnace and the one at which there is the greatest liability for leakage, the especially secure joint afforded by the three-line contact islocated here.

The feed section is formed with the conical or tapered surface 16 which terminates in the verticallyribbed or undulatory surface 17 and aroundthe upper edge of the feed section is provided the continuous groove 18 formed between the vertical flanges or ribs 19. The radiator is formed with `vertical undulations 20 to correspond to the surface 17 and the lower edge of the radiator is provided with the rib 21 which seats within the groove 18, and also with a laterally extending flange 22 which overlies one of the flanges 19. While the joint shown at the junction between the radiator and the feed section is not as secure as that shown just below, it is suliiciently secure to serve the purpose at this joint, at which the liability for leakage is not so great.

In assembling or building the furnace, the various joints are sealed with the usual cement, which in the upper edges of the lire pot and feed section is held within thc grooves l2 and 18. lhen the next section is put in placevtlle mating ribs are tightly sealed an 'l the joint is further reinforced by the outstanding flanges l5 and 22 lying over their respective 'ribs 13 and 19. The cement lling the grooves and on thetop of the ribs effectually seals the joints as has been described, 4 he three-point Contact at the top of the fire pot being especially efficacious.

What I claim is:

1. In a furnace construction comprising a fire pot and a feed section placed thereon, the fire pot having a continuous groove about its upper edge, a continuous rib about the lower yedge of the feed section, the groove being bounded by continuous anffes and laterally extending flanges on the sit es of the feed section overlying` the first nanied' flanges whereby alcontinuous three linecontact is provided about the' joint between the feed section andthe fire pot.

2. In a furnace construction composed 'of a series of sections placed lone above the.

the groove and laterally extending flanges on the upper of said' sections overlying .the walls about-the said groove on both sides thereof whereby a Acontinuous three line con tact is provided sections. Y'

3. In a furnace construction composed of a series of sections placed one above the.

other, one of said sections being a fire pot, a feed section above the lire pot, said feed section being formed with vertical undulations therein, a radiatorabove the feed section formed with corresponding vertical undulations, a continuous groove bounded by vertical walls on the upper edge of the fire pot and a similar groove on the upper edge of the feed section, the feed section and radiator seating at their lower edges within respective grooves and lateral flanges on the section overlying a wall of each said groove.

l. In a furnace construction composed of a series of. sections placed one above the other, one of said sections being a fire pot,

about the jointbetween the viding 'a continuous groove therebetween,

section ,and a feed section `oirsaid lire pot,

spacedcontinuous vertical walls about the upper edge of .the fire pot providing acircurnferential groove, a rib on the lower edge of the lire potseated within the groove and laterally extending flanges adjacent vthe.l

lower edge of the. fire pot overlying the walls.' t u 6. In a furnace construction, a plurality of sect-ions one above the other, spaced continuous vertical walls about the upper edge of a lower section providing a circu1nfer ential groove, the lower edge of an upper section seating within the groove and latere. ally extending flanges onboth sides .ofthe upper section overlying the vertical` walls whereby a continuous three linecont-act is v'T'.Infa furnaceconstruction, a plurality of sections one above the other, spaced kcontinuous vertical walls about the upper edge of a lower section providing a ycircumferential groove, the lower edge of an upper section seating within the ygrooves and a laterally extending ilangelon the upper section overlying a vertical wall.

x 8. In a furnace construction, a plurality ofseetions one above the other, spaced vers tical walls about an edge of one section pio the mating edge of theadjacentv section received'within the groove and laterally eX- tending vflanges on both side of the lasti nained section opposite said .walls and providing a continuous three line contact'abont the fissure between the sections.

9. In a furnace construction, a fire pot section, the upper yedge being formed with two parallel spaced Valls to provide'a continuous circumferential `groove therebetween, and a second furnace section above the fire potscction having its lower edge seated within thegroove and laterally cxtending flanges on the second section overlying the walls whereby a continuous three line contact is afforded above Ythe fire pot section.

JOHN KERCH. 

